When it comes to the world of music, most people know it was Dolly Parton who wrote the smash hit “I Will Always Love You,” which was made even more famous by the big-voiced singer Whitney Houston.

Also a singer and songwriter, her sister Rachel Parton George released her debut album, Light Up the Night, in 1984 and also starred in the early ’80s television series 9 to 5, based on the 1980 hit ...